Using visibility distance as a criterion, halogen and conventional continental European high and low bean were experimentally compared in a series of field experiments. The main results were as follows. On high beam without opposing light, visibility distances are acceptable. The halogen headlights offered about 25% longer visibility distances (190 m) than the conventional headlights (155 m). With both opposing cars using low beam, visibility distances even under these very favorable conditions were quite insufficient (45-55 m). There was a slight advantage (less than 5 m) in favor of halogen headlights. The optimal dipping distance was a function of high beam system (intensity) rather than low beam system. Small differences in aiming, atmosphere, etc., caused larger differences in visibility distances than did the headlight system. /Author/

  • Supplemental Notes:
    • Appeared in Symposium on psychological Aspects of Driver Behavior, Vol. 2-Applied Research.
  • Corporate Authors:

    Road Safety Research Foundation

    P.O. Box 71, Deernsstraat 1
    Voorburg 2110,   Netherlands 
  • Authors:
    • Rumar, K
  • Publication Date: 1971-8

Media Info

  • Features: Figures; References;
  • Pagination: 12 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00099566
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Report/Paper Numbers: HS-013 490, HS-013 495
  • Files: HSL, TRIS
  • Created Date: Nov 5 1975 12:00AM